Journal ArticleDOI
On the performance of a polarization sensitive adaptive array
TLDR
In this paper, the ability of a least mean square (LMS) adaptive array to adapt to the electromagnetic polarization of incoming signals is considered and the output signal-to-interference-plus-noise ratio (SINR) from the array is computed as a function of the signal angles of arrival and polarizations.Abstract:
The ability of a least mean square (LMS) adaptive array to adapt to the electromagnetic polarization of incoming signals is considered. An array of two pairs of crossed dipoles is studied. A desired signal and an interference signal are assumed to arrive from arbitrary directions with arbitrary elliptical polarizations. The output signal-to-interference-plus-noise ratio (SINR) from the array is computed as a function of the signal angles of arrival and polarizations. It is shown that as long as certain special desired signal polarizations are avoided, the array is difficult to jam with a single interference signal. To produce a poor SINR, an interference signal must both arrive from the same direction and have the same polarization as the desired signal.read more
Citations
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Journal ArticleDOI
On the Capacity of Radio Communication Systems with Diversity in a Rayleigh Fading Environment
TL;DR: Results show that with optimum linear processing at the receiver, up to M/2 channels can be established with approximately the same maximum data rate as a single channel with the potential for large capacity in systems with limited bandwidth.
Journal ArticleDOI
Optimum Combining for Indoor Radio Systems with Multiple Users
TL;DR: With optimum combining, radio communications can be used in high-density, multiple-user environments, such as within buildings, even when only limited bandwidth is available.
Journal ArticleDOI
The tripole antenna: An adaptive array with full polarization flexibility
TL;DR: In this paper, the performance of an adaptive array using three mutually perpendicular dipoles (a "tripole") is studied, where a desired signal and an interference signal, each with arbitrary angle of arrival and polarization, are assumed incident on the array.
Journal ArticleDOI
Smart antennas in wireless communications: base-station diversity and handset beamforming
TL;DR: In this paper, the authors review diversity and smart antenna research applied to both base-stations and terminals, and illustrate the performance gains possible, describing research being conducted by the Smart Antenna Group at Virginia Tech.
Journal ArticleDOI
Spatial correlations in adaptive arrays
TL;DR: The adaptive array performance is dominated by this coefficient and can be improved by properly choosing the first three factors, and several examples on the selection of element placement in adaptive arrays are presented.
References
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Journal ArticleDOI
Linear Diversity Combining Techniques
TL;DR: Analysis of three types of diversity combining systems in practical use, finding that the simplest possible combiner, the equal-gain system, will generally yield performance essentially equivalent to the maximum obtainable from any quasi-linear system.
Journal Article
Adaptive arrays
TL;DR: A method for adaptively optimizing the signal-to-noise ratio of an array antenna is presented and the relation of the adaptive array to sidelobe cancellation is shown, and a real-time adaptive implementation is discussed.
Journal ArticleDOI
Adaptive antenna systems
TL;DR: In this article, a simple adaptive technique based on the least-mean-squares (LMS) algorithm is proposed to adjust the variable weights of a signal processor by forming appropriate nulls in the antenna directivity pattern.
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Adaptive arrays—An introduction
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An adaptive array in a spread-spectrum communication system
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